Pin puller



Nov. 13 1923. B94749115@ H. vv. MORROW PIN FULLER Filed Jan. 1'7, 1923 2Sheets-Sheet 2 INVENTOR y HIS ATToNEv Patented Nov. i3, i923.

@ATWT HOWARD W. MOR-ROW, OF PHLLIPSBURG, NEW' JERSEY, ASSIGNOB/ T0INGERSOLL- RAND COMPANY, 0E JERSEY CTY,

NEVI JERSEY, A CORPGRATION OF NEVJ JERSEY.

PIN FULLER.

Application filed January 17, 1923. Serial No. 613,086.

T 0 @ZZ who/m. t may concern.'

Be it known that l, Howiinn W. Monnow, citizen ot the UnitedStates, anda resident of Fhillipsburg, in the county of Warren and State of NewJersey, have invented a certain Pin Puller, of which the following is aspecification accompanied by drawings.

This invention relates to pin pullers and particularly to a levice ofthis character adapted to operate in conjunction with a drillsharpening` machine to withdraw the pin from a hot drill steel, usuallyinserted into the bore ot the steell to maintain the bore at its properdiameter.

Pin pullers of various types are at present used for performing theoperation of re4 moving` the pin from the bore of the steel, whichoperation usually requires considerable torce because the pinV becomestightly wedged in the hole. Such ain pullers have been provided eitheras separate machines or as an adjunct to the drill sharpening` machineproper, operated independently, either by hand or foot power, or byseparate mechanical means.

The primary object of this invention is to enable a pin puller to beconveniently mounted on or built in the stationary portion or a drillsteel sharpening machine and operatively connected to a movable memberoit the drill sharpener so that the pinpuller is operated by saidmovable member of the drill Sharpener, instead of by separate orindependent manual means. A further object is to simplify and improvethe operating mechanism of the pin puller and to permit the saine to beautomatically locked in inoperative position when not in use, manuallyoperated means adapted to function. independently or" the movable jaw ofthe drill Sharpener being provided for releasing the operating mechanismwhen it is desired to use the pin puller.

A still further object is to operate the pin puller by simple and ruggedmechanism employing a rack and pinion to edect relative movement of thedrill steel and the pin to be removed or withdrawn therefrom. Furtherobjects of the invention will later appear and to ill these ends theinvention consists of.

the combination of elements and arrangement of parts substantially ashereinafter fully described in the following specification andillustrated in the accompanying drawing', in which- Figure l is a sideelevation partly in section along' the line 1-l of Figure 2 looking inthe direction ot' the'arrows showing a portion of a drill Sharpenerhaving the pin puller operatively mounted thereon preparatory to pullinga pin from a drill steel;

F igure 2 is a top plan view of the pin puller;

Figure 3 is a side elevation partly broken away of the pin pullershowing the device in the act of completing the pin pulling operation,and

Figure 4 is a horizontal sectional view taken on the line i-l of Figurel lookin" in the direction of the arrows.

Referring to the drawings, the base or cylinder A of a drill sharpenerhas a movable jaw member or crosshead B carried by the plunger rod Cwhich is adapted to be actuated bv a piston (not shown) operating in thebase or cylinder.

The pin puller shown in this instance comprises the frame D, which maybe secured at the side M1 Lbe base A in any suitabh` manner, as `by thebolts E. The frame D preferably includes an outer section F. a centralvfiller section il? and an inner section H which rests against the baseA. A bracket member J is interposed between the sections F and ti at theupper portion ot the frame and another bracket K locatet at the bottomof the frame D. These brackets l and la may be formed intee'rallv withthe opposinn' :trame sections F and G or may be secured between thesections in any suitable manner. The bracket J acts as a support for astationary member shown in the form of an abutment L forming a worksupport against which a drill steel O is adapted to rest. This abutmentmav be provided with a recess P tor receiving the end of M drill steelO, and also with a groove Q adapted to receive the pin R which has beendriven into the end of the steel to maintain the diameter oi the centrallbore .S and which pin R is to be removed. The stationary abutment L maybe urovided with lugs T a' ilLs sides adapted to register with similarlugs U formed on the sides of the sections F and loo VGr so that bolts Vmay pass through these lugs to rigidly secure the stationary abute.

end of tlie rack lilladjacent to the stationary t abutment L. rTheabutment a as sliownlhas a groove b aligned with the groove L); of thestationary abutment L and both of the grooves Z) and are adapted to bealignedwith the central bore S of the drill steel O, so that the twoabutments a and L.v the one movable with the rack and the other immovable, maybe interposed between the end of the drill steel and thehead c of the pin R, the pin R resting in the grooves i) and Q.

Suitable operative devices, shown in this instance as raclr and pinionmechanism operated by the crosshead, are provided for causing relativemovement between the stationary and movable abutments to effect removalof the pin fromthe steel. The rac-ltv and pinion nieclianismrincludespreferably a vertically reciprocable actuating raclr l having .teeth cand longitudinal ribs j' on its opposite sides, the ribs f being adaptedto traverse guiding grooves q in the opposing faces of the sections Gand H. The teeth e ofits circumference and a non-toothed portion t isrigidly secured on the squared portion g of the shaft 0. The teeth s ofthe ear r' are adapted to mesh with the teeth of the pin puller rack W,and as the gear ris fast to the pinion 7i, which in turn meshes with theteeth c of the vertically reciprocable actuating raclr d, the pin pullerrack W. carrying the movable abutment. a. will be moved back and forthin accordance with the reciprocatory movements of the actuating rack d.A bearing member u secured on themovable crosshead B of the drillsharpkener by bolts o is adapted to engage the top uref the actuating`rack (l as shown in Figure l,v and will move the rack downward asv thecrolsshead B is lowered toA the position shown inV Figure 3.

Resilient means are preferably provided for effecting movement of theactuating rack cl in the opposite direction. These means may include acoiled spring m which is adapted to be secured between the pro- 'iectingtop portion y of the rack Z and the bracket K which is rigidly locatedat the base of the guides g, and this spring :c is compressed with eachdownward movement of the crosshead when the pin puller is in operation.Y v

The spring m is provided with suitable guiding meansV to maintain itsalignment and prevent buckling. n this instance the spring'surrounds andis guided'by a plunger a which is screwed into the projecting portion y,as shown at l, and a cylinder 2 of substantially the same diameter asthe plunger a, screwed into or otherwise suitably fixed to the bracketK, as shown' at The plunger e has a smaller Vdiameter portion il whichis supported and guided in the cylinder '2, and the cylinder 2 ispreferably provided with an aperture 5 at one end to' maintainatmospheric pressure within the cylinder 2, thus preventing thebui-lding up of air cushions which would tend to impede movement of theplunger e, and hence the rack d. Y

Then the crosshead has been lowered and the pin puller rack moved to theposition indicated in Figure 3, the gear r will be automatically caughtand held against return movement by securing means which may include apallet or catch 6, secured to a handle and pivoted between the framesections F and Gr as shown at 8, so that the weight' of the handlenormally causes the pallet 6 to bear against the non-toothed surface 2fof the gear 7 until the gear r reaches a'point where the pallet 6 entersthe notch 9 adjacent to the last tooth l() which will be when thecrosshead B `has practically descended to the limit of its movement. Thepin pulling apparatus is thus heldin inoperative position against theforce of the spring m with the movable pin engaging means a retracted sothat the drill sharpening. machine may be freely used for otheroperations without actuating the pin puller. Vhen it is desired torestore the pin puller to operation, the handle 7 is manually raisedslightly, turning the pallet 6 on itspaXis 8 so that the pallet leavesthe tooth 110. whereupon the gear r will be released and the spring willcause the vertically reciprocable actuating rack d to rise. This reversemovement of the actuating rack CZ results in corresponding reversemovement of the piniony 7L, gear r, pin puller rack VJ and movableabutment a, and the rising movement of the rack d continues until theabutment a assumes its initial position against the stationary abutmentL. Obviously, the crosshead B and handle 7 may be raised to permit thepin puller to return to initial position after a pin has been pulledfrom a steel so that the pin will be carried to the front of the machineWhere it may be more easily removed from the grooves 7) and Q., afterwhich the pin puller will be locked in'its inoperative position by asncceeding descending movement orp the crosshead.

The diameter of the gear r is preferably greater than that of the piniont in order to transmit motion which will result in the pin puller rack Wobtaining a greater length of travel than the distance traveled by thecrosshead B. This is necessary because in practical use the pins O aregenerally of considerable length while the distance of movement of thecrosshead B in actual prac` tice is comparatively small. In the presentinstance, the diameter of the gear 7' is substantially twice that of thepinion 71. which enables the rack W to move substantially twice thedistance traveled by the cross head B in its raising and loweringmovement.

I claim:

l. A pin puller adapted to be associated with a drill sharpening machinehaving a movable crosshead, said pin puller comprising a stationarymember and movable pin engaging means, both adapted to be interposedbetween the end of a drill steel and the end of a pin inserted in saidsteel and means for eliecting relative movement of said elements tocause the removal of the pin from said steel. said last mentioned meansbeing actuated by movement of the movable crosshead of the sharpeningmachine, and means independent of the crosshead for retaining saidcrosshead actuated means in inoperative position.

2. A pin puller adapted to be associated with a drill sharpening machinehaving a movable crosshead, said pin puller comprising a stationarymember and movable pin engaging means, both adapted to be interposedbetween the end of a drill steel and the end of a pin inserted in saidsteel, and means for eecting relative movement of said element-s tocause the removal of the pin from said steel, said last mentioned meansbeing actuated by movement of the movable crosshead of the sharpeningmachine., means independent of the crosshead tor retaining saidcrosshead actuated means in inoperative position, and means for causingsaid crosshead actuated means to return to initial position.

3. A pin puller adapted to be associated with Va drill sharpeningmachine having a movable crosshead, said pin puller including astationary member and movable pin engaging means adapted to beinterposed between the end of a drill steel and the end of a pininserted in said steel, a pin puller rack and a pinion adapted to eectInovement of said pin engaging means to cause the removal of the pinfrom said steel, said pin puller rack and pinion being actuated bymovement of the movable crosshead of; the drill sharpening machine, andmeans for retaining said pin puller rack and pinion in inoperativeposition.

4. A pin puller adapted to be associated with a drill sharpening machinehaving a movable crosshead, said pin puller comprising a plurality ofmembers adapted to be interposed between the end of a drill steel andthe end of a pin inserted in said steel. a pin puller rack and pinionadapted tro effect relative movement of said members to cause theremoval of the pin from said steel., said pin puller rack and pinionbeing actuated by movement of the movable crosshead of the sharpeningmachine, means for retaining the movable element in its withdrawnposition, and means for causing said movable element to return toinitial position.

- 5. A pin puller adapted to be associated with a drill sharpeningmachine having a vertically movable crosshead. said pin pullercomprising a stationary member and movable pin engaging means adapted tobe interposed between the end of a drill steel and the end of a pininserted in said steel, rack and pinion mechanism actuated by saidcrosshead for moving said pin engaging means to cause the removal oi thepin from the steel, automatic means Jfor retaining said pin engagingmeans in the moved position, and manually released means for returningsaid pin engaging means to its initial position.

6. In a pin puller for pulling a pin from an object, a stationary base7a movable crosshead, a stationary abutment against which the object isadapted to rest and a movable abutment adapted to engage the head of thepin, said abutments being mounted on said stationary base. rack andpinion mechanism actuated by the crosshead for moving the movableabutment away from the stationary abutment to cause removal of the pinfrom the object. and means independent of the crosshead adapted toretain said raclr and pinion mechanism in inoperative position.

7. In a pin puller 'for pulling a pin from an object, a stationary base,a .movable crosshead, a stationary abutment against which the object isadapted to rest and a movable abutment adapted to engage the head of thepin, saidl abutments being mounted on said stationary base, rack andpinion mechanism actuated by the crosshead for moving the movableabutment away from the stationary abutment7 means independent of thecrosshead adapted to retain said rack and pinion mechanism ininoperative position and means for restoring said rack and pinionmechanism to operative position.

8. iIn a pin puller for pulling a pin from an object, a stationary base,a vertically movable crosshead, a stationary abutment against which. theobject is adapted to rest and a horizontally movable abutment adapted toengage the head ot the pin, said abutments being mounted on saidstationary base, rack and pinion mechanism actuated by the crosshead tormoving the movable abutment away trom the stationary abutment, and meansadapted to retain said rack and pinion'mechanism in inoperative posiVtion and to cause the same to returnl to operative position.

9. A pin puller adaptable for association with a drill sharpening`machine having a stationary base and a movable crosshead, said pinpuller including` a stationary mein ber and movable pin engaging meansboth adapted to be interposed between the end of a drill steel and theend of a pin to be removed from said steel. rack and pinion mechanismactuated by the crosshead tor etlecting movement otsaid pin engagingmeans to cause the removal ot the pin trom the steel, and automaticmeans independent of the crosshead for renderingl said rack and pinionmechanism inoperative.

l0. A pin puller adaptable for association with a drill sharpeningmachine having a stationary base and a removable crosshead7 said pinpuller including a stationary member and movable pin engaging means,both adapted to be interposed between the end ota drill steel and theend of a pin to beV removed from said steel, rack 'and pinion mechanismactuated by the crosshead tor effecting movement of said pin engagingmeans to cause the removal ot the pin trom t-he steel, automatic meansindependent of the crosshead for rendering said raclr and pinionmechanism inoperative, and non-automatically actuated means forpermitting said rackand pinion mechanism to return to operativeposition.

l1. A pin puller adapted to be mounted at the side of a drill sharpeningmachine having av stationary base and a vertically movable crosshead.said pin puller com prising a stationary member and horizontally movablepin engaging means,. bot-h adapted to be interposed between the end ot adrill steel and the end ot' a pin to be removed trom said steel, rackand pinion mechanism actuated by the crosshead tor effectingmovement otsaid pin engaging means to cause the removal oit the pin from the steel,and automatic means independent of the crosshead 'for retaining said pinengaging means in inoperative position.

12. A pin puller adapted to be mounted at the side of a drill sharpeningmachine having a stationary base and a vertically movable crosshead',said pin puller comprising a stationary member and horizontally movablepin engaging means both adapted to be interposed between the end of adrill steel and the end oi a pinto be removed from said steel, rack andpinion mechanism actuated by the crosshead for eiiecting movement otsaid pin engaging means to canse the removal of the pin 'tron the steel,automatic means independent of the crosshead for retai ing saidpin.engen1- ing means in inoperative position and manually releasedmeans'tor permitting said pin engaging means to retnrn to oaerativeposition. i

13. A pin puller adapted to be mounted at the side ota drill sharpeningmachine having a stationary base and a movable crosshead, said pinpuller comprising a stationary member and movable pin engaging means,Aboth adapted to be interposed between the Vend ot a drill steel and theend of a pin to be removed trom said steel, rack and pinion mechanismactuated by the crosshead for etieeting movement ont' said pin engagingmeans to cause removal et the pin :trom the steel, automatic meansindependent et the crosshead tor retaining said pin eng ging meansV inthe moved position released spring and `manually actuated means torcausing said movable pin engaging means to return to operative position.

14.' A pin puller for pulling a pin from an object comprising astationary base, a movable crosshead, a stationary abutment gainst whichthe object is adapted to rest, and movable pin engaging means adapted toengage the head of the pin7V said 1pin engaging means being mounted onva reciprocable pin puller rack, a mutilated gear adapted to engage theteeth of said pin puller rack, a pinion fast to said gear, areciprocable actuating raclr adapted to actuate said pinion, bearingmeans on the movable crosshead adapted to engage and depress saidreciprocabl@ actuating raclr when the crosshead is lowered, causingmovement of said pin engaging means away from the stationary abutmentautomatic means adapted to retain saidpin engaging means in inoperativelposition and non-automatic means for releasing said automatic means tocause the pin engaging means to be returned to its initial operativ@Jposition when the movable crosshead is raised.

l5. A pin puller adaptable for association with a drill sharpeningmachine having a stationary base and a vertically movable crosshead,said pin puller comprising a stationary abutment against which theobject is adapted to rest, and movable, pin engaging means adapted toengage, the head of the pin. said movable pin engaging means beingmounted-on a horizontally reciprocable toothed pin puller rack adaptedto actuate said pinion, resilient means tending to maintain thereciprocable actuating rack loo in its uppermost position, bearing meanson the iovable crosshead adapted to engage and depress the reciprocableactuating rack when the crosshead is lowered, causing movement oi' thepin engaging means aWay from the stationary abutment, a pallet adaptedto engage a tooth oi the mutilated gear to retain said pin engagingmeans in inoperative position against said spring and means forreleasing said pallet to permit the spring to effect the return of themovable pin engaging means to initial operativey position Tvhen themovable crosshead is raised.

16. A pin puller for a drill sharpener having a stationary base and amovable crosshead, said pin puller comprising means for holding thedrilled steel, means for operatively engaging the pin, and rack andpinion mechanism actuated by the crosshead for eecting movement of saidpin engaging means relative to the steel to Withdraw the pin from thesteel.

17. A pin puller for a drill Sharpener having a stationary base and amovable crosshead, said pin puller comprising means for holding thedrill steel, means for operatively engaging the pin, rack and pinionmechanism actuated by the crosshead for eifecting movement of said pinengaging means relative to the steel to Withdraw the pin from the steel,and means adapted to retain said pin puller in inoperative position.

18. A pin puller for a drill Sharpener having a stationary base and amovable crosshead, said pin puller comprising means for holding thedrill steel, means for operatively engaging the pin, rack and pinionmechanism operated by the crosshead i'or eiiecting relative movement orsaid pin engaging means to withdraw the pin from the steel, meansadapted to retain said pin engaging means in inoperative position, andmeans ior restoring. said pin engaging means to opera-.ive position.

19. A. pin puller for a drill Sharpener having a stationary base and amovable crossliea-d, said pin puller comprising means for holding thedrill steel, means for operatively engaging the pin, rack and pinionmechanism operated by the crosshead for eii'ecting movement of said pinengaging means relative to the steel to Withdraw the pin from the steel,and automatic means adapted to retain said pin engaging means ininoperative position.

20. A. pin puller for a drill Sharpener having a stationary base and amovable crosshead, said pin puller comprising means for holding thedrill steel, means for operatively engaging the pin, rack and pinionmechanism operated by the crosshead for eiecting movement of said pinengaging means relative to the steel to Withdraw the pin from the steel,automatic means adapted to retain said pin engaging means in inoperativeposition, and manually released means for restoring said pin engagingmeans to operative position.

In testimony whereof I have signed this specification.

HOWARD WV. MORROW.

